Richard whitaker



llnrrnn STATES PATENT rrrcn.

RICHARD WHITAKER, OF NEW BRUNSWICK, NEW JERSEY, ASSIGNOR THE NEVERSLIP MANUFACTURING COMPANY, OF SAME PLACE.

HORSESHOE-CALK.

SPECIFICATION forming part of Letters Patent No. 610,212, dated September a, 1898.

Application filed March 2 3 1 898.

To all whom it may concern:

Be it known that I, RICHARD WHITAKER, a citizen of the United States, residing at New Brunswick, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Horseshoe- Calks, of which the following is a specification, reference being had therein to the accompanying drawings. I

This invention relates to removable horseshoe-calks; and its objects are to provide a strong and lasting calk designed mainly to meet the conditions existing on hard paved streets, whereon the calks should have a large wearing-surface of steel, and their connecting-body, with the shoe, should be of soft iron to prevent breaking of the neck of the calk at that point when striking the edges of paving-stones, but tapering, with its widestpart at its outer end, to permanently retain the steel casing. I attain these objects by the construction illustrated in the accompanying drawings, in which- Figure 1 represents, partly in side view and partly in section, a horseshoe, showing in vertical section one heel-call; and one toecalk constructed in accordance with my invention. Fig. 2 isa horizontal section, on line 00 a; of Fig. l, of the cylindrical soft-iron plug and cylindrical steel shell, shown secured to the heel of the shoe in said Fig. 1. Fig. 3 is a horizontal section, on line y y, of the calk, shown secured to the toe of the shoe in Fig. 1. Fig. 4 is a horizontal section of a slightly modified form of calk constructed in accordance with my invention. Fig. 5 is a horizontal section through an octagonal calk constructed in accordance with my invention. Fig. 6 is a vertical section through a slightlymodified form of calk in which the steel shell is without an end. Fig. 7 is a vertical section of a modified calk in which the soft-iron plug has no collar. Fig. 8 is a vertical section of a modified calk in which the soft-iron plug is screw-threaded the Whole length and capped at one end.

In said drawings, A represents ahorseshoe of any suitable and well-known form, to

which is shown secured to one of the heels a central plug B, 'of soft iron, substantially cylindrical its whole length. Its upper por Serial No. 674,871. (No model.)

tion I) is screw-threaded. Its lower portion b is primarily made cylindrical or prismatic, and between themis a collar 6 that may be made either cylindrical or polygonal to facilitate screwing the'screw-threaded portion of tion b of the plug is slightly more than the depth of said cavity, so that after the shell C has been placed upon the lower portion of the plug if heavy pressure is made to bear upon the end of the shell the portion 17 of soft iron, becomes upset, and it takes a slight taper wider at its lower end, and thus the shell becomes immovably secured to the plug. The collar 5 of the plug (shown in the heel of the shoe in Fig. 1) is of slightly larger diameter than the diameter of the shell C to receive the calk-screwing wrench without disturbing the adhesion of the shell to the plug, as in that call: the part b and the shell are not prismatic; but in the calk shown secured to the toe of the shoe in Fig. 1 and also in Fig.

3 both the part b of the plug and the shell are hexagonal, and there is no danger of disturbing their relations while rotating them, and, furthermore, the part I being upset within the cavity of the shell by heavy pressure, said parts remain perfectly united to each other until the lower portion of the plug and the shell are entirely worn away.

In Figs. 3 and 5 the lower portion of the soft-iron plug and the steel shell are shown soft-iron plug being slightly upset or riveted to the surrounding steel shell. This form is also the form acquired by the calks shown in Fig. 1 after they have been in use for some time and the end of the steel shell has become worn away.

In the calk shown in Fig. 7 the soft-iron plug is shown as made without a collar; but the bottom portion is, as in Fig. 1, either cylindrical or polygonal, preferably polygonal, to be received in a correspondingly-formed steel shell, the latter being of convenient use ti facilitate the screwing of the calk to the 5 0e.

In either of the forms shown the soft-iron internal plug is protected against rapid wear by the steel shell surrounding orinclosinglit.

I am aware that horseshoe-calks have been made in two parts of metals of different hardness, the central part being screw-threaded the whole length and the encircling part screwed thereon and provided with means to lock it to the shoe, and I do not claim, broadly, the use of these two metals in a horseshoecalk.

Having now fully described my invention, I claim- 1. A removable horseshoe-call: consisting of a central plug having one end screw-threadof a central plug of soft iron having one end screw-threaded and its opposite end received into a shell of harder metal internally wider at its wearing end and secured thereto, substantially as described.

3. A removable horseshoe-calk consisting of a central plug of soft iron having its pe riphery screw-threaded in combination with a shell of harder metal encircling and covering one end of said plug and secured thereto, substantially as described.

4. A removable horseshoe-call; consisting of a central plug of iron having a collar about half-way of its length and the end above said collar screw-threaded, in combination with a shell of steel internally wider in its Wearing end covering and encircling the end of said plug under its collar and secured to said plug, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

RICHARD WHITAKER.

Witnesses:

Gno. McCoRMIcK, FRANK E. FISHER. 

